Texas Instruments TI-83-Plus - Page 91

TIp 8: Finding the Best Line of Fit for a Set of Data
Fundamental Topics in Science © 2001 Texas Instruments

TIp 8-3
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Try-It!
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on Your TI
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83 Plus
(continued)
Find the Linear Regression for the Scatter Plot
Find the regression (the line which best fits the data) for
L
1
and
L
2
using
LinReg(ax+b)
.
To Do This Press Display
1. Return to the Home screen, and clear
it.
- l :
2. Select
LinReg(ax+b)
from the
STAT
CALC
menu.
g
"
4:LinReg(ax+b)
3. Select the lists
L
1
and
L
2
.
\ 
1:L
1
¡
\ 
2:L
2
¡
4. Display
Y-VARS
menu. Then select
the Y variable (
Y
1
) from the
FUNCTION
menu.
5. Calculate the regression equation.
r a
1:Function
1:Y
1
b
6. Display the Y= editor.
Note
: Both
Y
1
and
Plot1
are highlighted. This
means that both graph and the plot are turned on.
&